Gavin’s dominance against wily veteran Witter, the former WBC world light-welterweight champion, was reflected on the scorecards, which read 119-109 117-112 117-110.

The 27-year-old’s professional career had failed to live up to expectations due to a series of personal problems that threatened his future in the ring, but last night he delivered his finest win.

“I’m over the moon. Last year I didn’t know where my career was going, I didn’t even know if I’d be in the ring again,” Gavin said.

“Now I’m British champion and the world’s my oyster. Believe me, I’m only going to get better.

“I had a few confidence problems last year when I had some personal problems.

“No-one looks good against Witter, but I still beat him comfortably.

“I felt really strong in the second half of the fight. I’m fit, a different animal to what I used to be.

“No more setbacks now. I’m 27 and will only get better. My next step is to defend the title or go for a European title.”

Extending his unbeaten record to 14 victories, the Birmingham southpaw controlled the second half of the fight after working out Witter’s awkward style.

Regularly switching stance and punching from awkward angles, Witter provided Gavin with his toughest test yet before fading in the later rounds.

The 38-year from Sheffield was dismantled as Gavin’s class began to tell and while the fight was no classic, Britain’s only world amateur championships gold medal winner could be satisfied with an emphatic triumph.

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